Created attachment 135651 [details]
Partial kernel log showing many GPU faults and subsequent page table breakage
I'm reliably able to trigger GPU faults and various subsequent problems. The crash doesn't happen immediately, so far as I can tell.
One known trigger is to start a map then start another map on Unvanquished (http://www.unvanquished.net/). It appears that the heat haze option needs to be enabled (this one seems most reliable), and I think that the motion blur option may also trigger this.
Known effects, other than reams of GPU fault reports, include hard lock-ups and page table corruption; the attached file (gpu-crash-etc.txt) shows the latter (I chose to reboot soon afterwards).
Hardware is Bonaire XTX. Userland is X git (2535b76) with corresponding Radeon DDX, Mesa 10.2 git (e05ceba, built using xorg-edgers packaging), llvm 3.4-2 (Debian). GLAMOR is enabled.
The same with TAHITI (HD 7950).
What's your kernel version?
Now I see, 3.15-rc3. There is a regression in 3.15 which is being fixed. The 3.14 kernel should work fine.
I use drm-fixes-3.15, still not fixed there?
No, the fix hasn't been made yet.
Testing with that patch series applied – no problems noticed so far. Looks like we might have a fix for this bug here.
No further problems were noticed, and it's working fine with 3.15-rc7 (which includes those patches). Closing.